0xmnipresent

Our project offers a chain-agnostic NFT minting solution, allowing users to mint NFTs and pay gas fees using tokens from different blockchains. This eliminates the need for native tokens, providing a seamless and user-friendly experience for creators and collectors across multiple networks. With cross-chain compatibility and enhanced accessibility, we simplify the NFT ecosystem and drive broader adoption.

Our chain-agnostic NFT minting solution was built with a focus on flexibility, scalability, and user experience. The project integrates cutting-edge technologies to enable cross-chain transactions, with Hyperlane being the core cross-chain messaging protocol. Here's a breakdown of how we built it:

Technologies Used:

Hyperlane: We leveraged Hyperlane's cross-chain messaging infrastructure to facilitate secure and seamless communication between blockchains. Hyperlane allows for the transfer of data (in this case, gas fee payments and NFT minting instructions) across multiple chains, ensuring consistency and security.

Smart Contracts: Solidity-based smart contracts were deployed on each supported blockchain to handle the minting process. These contracts work in tandem with Hyperlane, listening for cross-chain messages related to gas fee payments and minting instructions.

Backend: Our backend is built using Node.js and Express to handle off-chain logic, API integrations, and user requests. This backend communicates with the smart contracts to initiate the minting process after verifying cross-chain payments.

Frontend: The frontend was developed using React.js for an intuitive and user-friendly interface. We utilized Web3.js and ethers.js libraries to interact with the blockchain from the client side, allowing users to connect their wallets and initiate the minting process.

Blockchain Networks: The project supports multiple blockchain networks, including Ethereum, Polygon, and Binance Smart Chain. Hyperlane enables the smooth transfer of data between these networks.

Cross-Chain Payment System: To enable gas fee payments with tokens from different chains, we built a custom cross-chain payment system. This system converts the token from the user's chain of choice into the appropriate amount of gas for the target chain, facilitated by liquidity pools and oracles for real-time token pricing.

Security: To ensure the security of cross-chain transactions, we implemented a multi-signature validation system on the target chain, verifying that the payment data received via Hyperlane matches the minting request.